A control method includes determining a first control signal of a first control unit, determining a second control signal of a second control unit, and controlling a light effect of the illumination device according to a control rule, the first control signal, and the second control signal. The first control signal is used to control an illumination device to generate a first light effect. The second control signal is used to control the illumination device to generate a second light effect.

A lighting unit having a microcontroller; and a near field communication (NFC)-enabled embedded device comprising NFC shared memory configured to be written to by both an external NFC reader/writer using near field communication and the microcontroller and configured to enable an operation of the lighting unit to be both monitored and controlled using NFC. In this manner, the operation of a lighting unit may be monitored using NFC and controlled by using one of two approaches, such as via a microcontroller within the lighting unit and/or a near field communication, NFC, via the NFC-enabled embedded device; wherein the microcontroller is configured to manage a communication protocol to facilitate communications between the lighting unit and at least one other NFC-enabled device.

The present invention proposes to use a power negotiation connection (e.g. the VBUS channel) of a power delivery interface for transmitting or receiving control commands or, respectively, status information to/from a lighting device. The power negotiation connection can be used as a communication channel that is fully independent of the data connection. It uses, for example, different protocols and different wires than the data connection. Control commands, such as dim level or color, can be encoded in a vendor defined message of a related power negotiation protocol.

A light emitting element driving device includes a first and second driving circuits, an abnormality detecting portion, a bypass path, and a switching portion. The first driving circuit can supply power to a light emitting element in a first mode, and is disabled to supply power in a mode other than the first mode. The second driving circuit can supply power to a light emitting element in a second mode. The abnormality detecting portion detects an abnormality of the light emitting element normally connected to the second driving circuit at least in the second mode. The bypass path connects the first driving circuit to the second driving circuit. The switching portion, is disposed in the bypass path so as to make the bypass path into a conductive state when an abnormality is detected, and to make the bypass path into a cutoff state when an abnormality is not detected.

A linear light-emitting diode (LED) lamp comprising a normally-operated portion and an emergency-operated portion is used to replace a luminaire operated only in a normal mode with alternate-current (AC) mains. The normally-operated portion comprises a fly-back converter whereas the emergency-operated portion comprises a rechargeable battery, a bidirectional circuit, a boost converter, a self-diagnostic circuit, and a control circuit. The linear LED lamp can auto-switch from the normal mode to an emergency mode according to availability of the AC mains and whether a rechargeable battery test is initiated. The bidirectional circuit is configured to convey a forward electric current and a reverse electric current to and from the rechargeable battery, respectively. The self-diagnostic circuit is configured to provide multiple sequences and to auto-evaluate battery performance according to the multiple sequences. During an auto-evaluation period, a terminal voltage on the rechargeable battery is examined with test results displayed in a status indicator.

The invention provides a lighting device comprising a transmitter, a controller and a sensor; wherein the controller is configured to control the transmitter to repeatedly transmit a second wireless message interleaved with a first wireless message, wherein the first wireless message has a first duration and comprises a first signal, wherein the second wireless message has a second duration and comprises a second signal; wherein the first duration and/or the second duration is adaptive during a lifetime of the lighting device; wherein the controller is configured to receive a measurement from the sensor and control the transmitter to transmit the second wireless message comprising the second signal comprising the measurement.

The invention provides a lighting device comprising a transmitter, a controller and a sensor; wherein the controller is configured to control the transmitter to repeatedly transmit a second wireless message interleaved with a first wireless message, wherein the first wireless message has a first duration and comprises a first signal, wherein the second wireless message has a second duration and comprises a second signal; wherein the first duration and/or the second duration is adaptive during a lifetime of the lighting device; wherein the controller is configured to receive a measurement from the sensor and control the transmitter to transmit the second wireless message comprising the second signal comprising the measurement.

An emergency lighting device includes a housing, a light emitter positioned in the housing, a control circuit positioned in the housing and operatively connected to the light emitter, an indicator light positioned in the housing, and a fault indicator circuit positioned in the housing and operatively connected to the indicator light. The fault indicator circuit is configured to monitor the light emitter, analyze activation of the light emitter, and activate the indicator light based on the analysis of the activation of the light emitter.

An emergency lighting device includes a housing, a light emitter positioned in the housing, a control circuit positioned in the housing and operatively connected to the light emitter, an indicator light positioned in the housing, and a fault indicator circuit positioned in the housing and operatively connected to the indicator light. The fault indicator circuit is configured to monitor the light emitter, analyze activation of the light emitter, and activate the indicator light based on the analysis of the activation of the light emitter.

The invention provides a lighting device comprising a transmitter, a controller and a sensor; wherein the controller is configured to control the transmitter to repeatedly transmit a second wireless message interleaved with a first wireless message, wherein the first wireless message has a first duration and comprises a first signal, wherein the second wireless message has a second duration and comprises a second signal; wherein the first duration and/or the second duration is adaptive during a lifetime of the lighting device; wherein the controller is configured to receive a measurement from the sensor and control the transmitter to transmit the second wireless message comprising the second signal comprising the measurement.